Transcription chloroplast genes

The chloroplast genes for the CFq subunits IV, III and I and for the a subunit of CFj are co-transcribed to give a primary transcript which is then processed to remove the intron in atp and to generate a number of smaller transcripts [148]. Nothing is known of the mechanisms of these processing events. The chloroplast genes for the /3 and e subunits of CFx are also co-transcribed [151,152]. The transcripts are translated on chloroplast ribosomes, as indicated by the sensitivity of... 

The transcriptions of several of the chloroplast genes are induced by light. The best studied example is the 32 kDa polypeptide of photosystem II [21]. It seems as if light induces the removal of a repressor or promotes the initiation of transcription... 

R Schantz and L Bogorad (1988) Maize chloroplast gene ndhD ndhE and psaC sequences transcripts and transcript poets. Plant Mol Biol 11 239-247... 

Proteins - Eukaryotic cells have several different RNA polymerases, each with a specialized function (Table 28.3). In addition to the special RNA polymerases that function in mitochondria and chloroplasts, there are three enzymes that transcribe various portions of the nuclear genome. Each of the nuclear RNA polymerases contains about a dozen subunits. In contrast to prokayotic systems, all of the eukaryotic RNA polymerases require additional protein factors (transcription factors) in order to bind to a promoter and initiate transcription. Transcription factors seem to play a major role in determining selectivity in the transcription of genes. 

Rochaix, J.D. (1996) Post-transcriptional regulation of chloroplast gene expression in Chlamydomonas reinhardtii. Plant Mol. Biol, 32 (1-2), 327-341. 

TRANSCRIPTION OF SOME CHLOROPLAST GENES COULD BE UNDER PHYTOCHROME CONTROL A COMPUTER PREDICTION AND ANALYSIS OF LIGHT-RESPONSIVE SEQUENCES... 

In the attempts to define the molecular mechanisms of phytochrome or light response in chloroplast on the level of transcription we have used the computer search and comparison of the known plant nuclear LRE sequences with chloroplast genes. As a result a number of homologous sequences was found. 

Transcription of Some Chloroplast Genes Could be Under Phytochrome Control A Computer Prediction and Analysis of Light-Responsive Sequences 593... 

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